Question

You are studying cell cycle progression in an early frog embryo. If you were to inject a protein synthesis inhibitor into a cell at the end of S phase, what would happen to the cell?

1) The cell would continue through the cell cycle normally.
2) The cell would enter G1 phase.
3) The cell would enter G2 phase.
4) The cell would undergo apoptosis.

Answer 1

If a protein synthesis inhibitor is injected into a cell at the end of S phase, the cell would enter G1 phase.

Step-by-step explanation:

If you were to inject a protein synthesis inhibitor into a cell at the end of S phase, the cell would enter G1 phase.

The cell cycle consists of several phases, including G1 (growth phase 1), S (synthesis phase), and G2 (growth phase 2). The S phase is responsible for DNA replication, and once it is completed, the cell progresses into G2 phase. However, if a protein synthesis inhibitor is injected at the end of S phase, the cell cannot produce the necessary proteins for DNA replication in the next cycle. As a result, the cell would enter G1 phase and wait for the conditions to improve before attempting DNA replication again.